223121369 has 2 divisors, whose sum is σ = 223121370. Its totient is φ = 223121368.

The previous prime is 223121357. The next prime is 223121399. The reversal of 223121369 is 963121322.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 127961344 + 95160025 = 11312^2 + 9755^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-223121369 is a prime.

It is a super-3 number, since 3×223121369³ (a number of 26 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not a weakly prime, because it can be changed into another prime (223121399) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 111560684 + 111560685.

It is an arithmetic number, because the mean of its divisors is an integer number (111560685).

Almost surely, 2^223121369 is an apocalyptic number.

It is an amenable number.

223121369 is a deficient number, since it is larger than the sum of its proper divisors (1).

223121369 is an equidigital number, since it uses as much as digits as its factorization.

223121369 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3888, while the sum is 29.

The square root of 223121369 is about 14937.2477049823. The cubic root of 223121369 is about 606.5226940017.

The spelling of 223121369 in words is "two hundred twenty-three million, one hundred twenty-one thousand, three hundred sixty-nine".